3Com 3031 Command Reference Manual page 393

LAPB and X.25 Configuration Commands 393
output-window-size: Size of output window. When X.25 window modulus is 8, its
value ranges from 1 to 7. When X.25 window modulus is 128, its value ranges
from 1 to 127. By default, its value is 2.
Description
Using the x25 window-size command, you can set the sizes of input and output
windows on the interface X.25. Using the undo x25 window-size command, you
can restore their default values.
This parameter in-packets determines the maximum number of correctly received
packets before X.25 sends the acknowledgement information. As long as the
bandwidth allows, the greater the window size, the higher the transmission
efficiency.
Out-packets determines the maximum number of data packets sent by X.25
before it receives the correct acknowledgment information. As long as the
bandwidth allows, the greater the window size, the higher the transmission
efficiency.
Please consult users' ISP about the sending and receiving window sizes. Unless
supported by the network, do not set these two parameters to different values.
For the related commands, see display interface, x25 map, x25 pvc, x25 switch
pvc, x25 xot pvc, x25 fr pvc, and x25 receive-threshold.
Example
Set the receiving and sending window sizes on the X.25 interface Serial0/0/0 to 5.
[3Com-Serial0/0/0] x25 window-size 5 5
x25 x121-address
Syntax
x25 x121-address x.121-address
undo x25 x121-address
View
Interface view
Parameter
x.121-address: X.121 address of an interface. It is formatted using the numerical
string from 1 to 15 bytes.
Description
Using the x25 x121-address command, you can set the X.121 address of an X.25
interface. Using the undo x25 x121-address command, you can delete the
address.
If the Router is accessed to X.25 public packet network, the ISP must assign a valid
X.121 address to it. If two Routers are only directly connected back to back, a user